A Challenge

The basic game of Tic Tac Toe is a competitive activity. Can you come up with a variation that is a cooperative game? Make sure the game will be engaging enough for two (or more) people to play.

Send your cooperative version to me (thiagi@thiagi.com) with the "Cooperative Tic Tac Toe" as the subject line. If our play-testing indicates that it is interesting, I will publish it (under your name) in a future issue of the Thiagi GameBlog.